Reliance Pro/Tran 2 A310A
#7 in 30 AFull review
The 10 circuit Pro/Tran 2 set up for two 30 A 240 V loads out of the box. Worth the premium only if you need those breakers.
Amazon $518.40$518.40
The Reliance Pro/Tran 2 A310A rates 4.0 among 30 A transfer switchs; the Reliance Pro/Tran 2 510D rates 3.4 among 50 A ones. The Reliance Pro/Tran 2 510D costs $51.10 less ($467.30 vs $518.40).
Reliance Pro/Tran 2 510D
#4 in 50 AFull review
A plain 10 circuit 50 A switch for a large generator. Choose it over meter models only when price matters most.
Amazon $467.30$467.30
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different rating classes (30 A and 50 A), and each is scored against the reference points for its own class, so a rating says how well each does among its own rating peers. How we rank explains each factor.
| Factor weight | Reliance Pro/Tran 2 A310A | Reliance Pro/Tran 2 510D |
|---|---|---|
| Overall rating | 4.0/5 | 3.4/5 |
| Value 35% | 47 $51.84 per circuit ($518.40, 10 circuits) | 55 $46.73 per circuit ($467.30, 10 circuits) |
| Circuits 25% | 100 10 circuits | 40 10 circuits |
| Features 20% | 50 wattmeters, UL listed | 25 UL listed |
| Warranty 20% | 100 5-year warranty | 100 5-year warranty |
Specifications
| Reliance Pro/Tran 2 A310A | Reliance Pro/Tran 2 510D | |
|---|---|---|
| Switching | ||
| Type | Manual | Manual |
| Circuits | 10 | 10 |
| Generator connection | 30 A | 50 A |
| Max generator | 7,500 W | 12,500 W |
| Voltage | 120/240 V | 120/240 V |
| Wattmeters | Yes | No |
| In the box | ||
| Inlet | L14-30 on the switch | none (wire to a separate inlet box) |
| Inlet box included | No | No |
| Generator cord included | No | No |
| Build | ||
| Outdoor rated | No | No |
| UL listed | Yes | Yes |
| Warranty | 5 years | 5 years |